2026ReportWP1Reference materialsRoadmap
Nanomedicine Reference Material Roadmap
Resch-Genger U.; Poul L.; Sack F.; Parot J.; et al. Zenodo report, version v1, published 6 July 2026. DOI: 10.5281/zenodo.21227912. CC BY 4.0.
Why this matters: This strategic WP1 output consolidates METRINO’s experience in developing nanomedicine reference-material candidates and identifies priorities for future development, provision and measurement comparability.
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2026DatasetWP1IONP10UCNP20SAXS
SAXS Data, Processing Scripts, Fitting Scripts, and Analysis Results for Iron Oxide (IONP10) and Upconversion Nanoparticles (UCNP20) within MetrINo
Silva B.; Gerina M. Zenodo dataset, published 14 June 2026. DOI: 10.5281/zenodo.20684412. CC BY 4.0.
Why this matters: This Empa contribution makes the SAXS data, processing and fitting scripts, and analysis results for the IONP10 and UCNP20 candidates available for transparent inspection and reuse. It should not be read as a consolidated dataset from every WP1 partner.
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2026Project deliverableWP2NanomedicinesCharacterisationSOPs
Good practice guide for physical and chemical characterisation of nanomedicines
METRINO Deliverable D3. Version 1, published 13 July 2026. DOI: 10.5281/zenodo.21641655. CC BY 4.0.
Why this matters: D3 brings together nine tested procedures for particle size, number concentration and surface characterisation, alongside broader decision tables supporting method selection. The decision tables draw on wider project experience, so not every listed option has a dedicated SOP.
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2026Project deliverableWP3Biological matricesSample preparationAF4
Protocols for sample preparation and measurement of nanoparticle stability and their biotransformation in biological matrices
LGC; LNE; University of Pavia; SMD; Empa; BAM; PTB. METRINO Deliverable D5, version 2, published 24 July 2026. DOI: 10.5281/zenodo.21536481. CC BY 4.0.
Why this matters: This public deliverable brings together protocols for matrix spiking, nanoparticle extraction and AF4-based fractionation in biological matrices. The record points to the corrected public version.
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2026Project deliverableWP3Biological matricesFractionationAF4SECSAXS
Good practice guide on validated protocols and SOPs of hyphenated fractionation methods of MONPs, LNPs and liposomes from liquid biological matrices
METRINO Deliverable D6. Version 1, published 28 July 2026. DOI: 10.5281/zenodo.21646537. CC BY 4.0.
Why this matters: D6 consolidates validated MD-AF4 and SEC protocols for lipid nanoparticles, liposomes and metal oxide nanoparticles, together with a complementary SAXS workflow for direct analysis in biological media. It reports performance evidence, critical operating parameters, applicability domains and limitations to support more reliable and comparable fractionation and characterisation across laboratories.
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2026Project deliverableWP4Cells & tissuesCorrelative imagingSOPs
Protocols for tissue, tissue-phantom and cellular nanoparticle measurements
METRINO Deliverable D7. Version 1, published 30 April 2026. DOI: 10.5281/zenodo.21537147. CC BY 4.0.
Why this matters: D7 consolidates preparation and analytical SOPs for tissue phantoms, engineered models, cells and tissues, including approaches for nanoparticle uptake, distribution, localisation, imaging and quantification.
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2026Project deliverableWP4Interlaboratory comparisonCells & tissues
ILC report on the identification, localisation and quantification of inorganic nanoparticles in tissue phantom samples
METRINO Deliverable D8. Version 1, published 30 April 2026. DOI: 10.5281/zenodo.21641447. CC BY 4.0.
Why this matters: D8 provides the interlaboratory evidence supporting the WP4 pathway. It shows where complementary approaches converge, where they answer different questions and where practical limitations remain; it does not imply that every method is interchangeable or universally validated.
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2026ArticleWP2Lipid nanoparticlesLiposomesMultimethod characterisation
Liposomes and lipid nanoparticles: a tutorial for advanced chemical and structural characterisation
Minelli C.; Parot J.; Alasonati E.; Altskär A.; et al. European Journal of Pharmaceutical Sciences 222, 107556.
Why this matters: This METRINO tutorial compares complementary dimensional, structural and chemical methods across well-defined liposome and LNP systems. It shows why no single technique captures their full complexity and supports more robust method selection and future harmonisation.
Read paperDOISupporting datasetExplore the WP2 resultD4 accepted manuscript
2026DatasetWP2Lipid nanoparticlesLiposomes
Dataset for the paper: Liposomes and lipid nanoparticles: a tutorial for advanced chemical and structural characterisation
Minelli C.; Parot J.; Alasonati E.; Altskär A.; et al. Zenodo dataset, published 8 June 2026. DOI: 10.5281/zenodo.20595798. CC BY 4.0.
Why this matters: The dataset exposes the measurements underlying the tutorial’s comparison of liposome and LNP characterisation methods, strengthening traceability and enabling readers to inspect and reuse the supporting evidence.
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2026ArticleWP2Iron oxide nanoparticlesUpconversion nanoparticlesCitrate ligands
Cross-validation of analytical methods for citrate ligand quantification on upconversion and iron oxide nanoparticles
Matiushkina A.; Brehme S.; Tavernaro I.; Andresen E.; et al. Analytical and Bioanalytical Chemistry 418, 5181–5191.
Why this matters: This METRINO-funded study cross-validates complementary approaches to citrate-ligand quantification and shows how method- and nanomaterial-specific effects can influence results. It supports more reliable surface characterisation through multimethod measurement schemes.
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2026ArticleWP2Iron oxide nanoparticlesFeraSpin™ RSizing methods
Effect of sampling volume on measurements of size and chemical homogeneity of MRI contrast agent FeraSpin™ R
Maceratesi V.; Doveri L. R.; Engel N.; Cantoni E.; et al. Nanoscale Advances 8, 3136–3150.
Why this matters: This METRINO study compares complementary particle-sizing measurands and shows why effective sampling volume and measurement length scale are especially important when interpreting chemical homogeneity in a complex nanomedicine formulation.
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2026DatasetWP2Iron oxide nanoparticlesFeraSpin™ R
Dataset for “Effect of sampling volume on measurements of size and chemical homogeneity of MRI contrast agent FeraSpin™ R”
Maceratesi V.; Doveri L. R.; Engel N.; Cantoni E.; et al. Zenodo dataset, version 1, published 10 February 2026. DOI: 10.5281/zenodo.20465258.
Why this matters: This 5 MB dataset exposes the measurements underlying the associated METRINO paper, allowing readers to inspect and reuse the evidence behind its comparison of sizing and chemical-homogeneity approaches.
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2026DatasetWP2Iron oxide nanoparticlesAF4
AF4-UV-MALS size distribution evaluations of iron oxide nanoparticle samples (IONP): retention time approaches
Caebergs T.; de Carsalade du Pont V.; Matiushkina A. Zenodo dataset.
Why this matters: The dataset documents retention-time approaches for estimating the size distribution of small iron oxide nanoparticles when the MALS signal provides limited size information.
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2026DatasetWP2Upconversion nanoparticlesSAXSDLS
Self-limited clustering of nanoparticles through electrostatic stabilisation at the cluster scale: dataset
Sapalidis D.; Andresen E.; Matiushkina A.; Resch-Genger U.; Neels A.; Silva B. F. B. Zenodo dataset.
Why this matters: These processed SAXS and DLS data support research on cluster formation and electrostatic stabilisation in upconversion nanoparticle systems.
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2026DatasetWP4Correlative imagingTPEFLA-ICP-MSToF-SIMS
22HLT04 EURAMET METRINO Deliverable 8 Correlative Imaging Comparison Data
Mortati L.; Nikolić M.; Sjövall P. Zenodo dataset.
Why this matters: This consolidated dataset supports comparison between TPEF, LA-ICP-MS and ToF-SIMS measurements on UCNP calibrators and 3D cell-tissue models.
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2026DatasetWP4LA-ICP-MSElemental mapping
METRINO: LA-ICP-MS elemental mapping data (D8)
Van Acker T.; Vanhaecke F. Zenodo dataset.
Why this matters: This method-specific dataset makes the LA-ICP-MS elemental mapping component of the WP4 correlative imaging work available for reuse and inspection.
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2026DatasetWP4Hf oxides2D cellsElemental analysis
METRINO D8 Table 11 raw data
Gogos A.; Bottone D. Zenodo dataset.
Why this matters: This record provides the raw data used for Table 11 of METRINO Deliverable D8, supporting traceability from the reported comparison back to the underlying measurements.
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2025ArticleProject-linkedIron oxide nanoparticlesSingle-event MS
Discrete Entity Analysis via Microwave-Induced Nitrogen Plasma–Mass Spectrometry in Single-Event Mode
Rua-Ibarz A.; Nakadi F. V.; Bolea-Fernandez E.; Bazo A.; et al. Analytical Chemistry 97, 24065–24072.
Why this matters: This project-linked publication acknowledges METRINO funding and evaluates single-event MINP-MS for discrete entities including iron oxide nanoparticles, cells and microplastics. It is included as METRINO-supported research, not as a flagship output assigned to a specific WP.
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2025DatasetWP2Ti oxidesZr oxidesHf oxidesDigestion
Raw data and calculated values for Gerken et al., Analytical Methods, 2025, 17, 5334
Gogos A.; Gerken L. Zenodo dataset.
Why this matters: This record provides the raw elemental-analysis data and recovery calculations underlying the METRINO paper on HF-free digestion of Ti, Zr and Hf oxides.
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2025ArticleWP2Ti oxidesZr oxidesHf oxidesDigestion
Alternative digestion strategy for Ti, Zr and Hf oxides: eliminating hydrofluoric acid
Gerken L.; Roesslein M.; Herrmann I.; Gogos A. Analytical Methods 17, 5334 to 5342.
Why this matters: This work supports safer analytical preparation strategies for oxide nanomaterials, helping improve robust characterisation workflows.
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2025ArticleCross-WPOrganic specimensTEM stainingSample preparation
Systematic comparison of Commercial Uranyl Alternative Stains for Negative and Positive Staining Transmission Electron Microscopy of Organic Specimens
Kissling V.; Eitner S.; Bottone D.; Cereghetti G.; Wick P. Advanced Healthcare Materials 14.
Why this matters: This work supports robust TEM sample preparation and imaging practices relevant to nanomedicine characterisation.
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2024ArticleCross-WPReference materialsSizing methodsParticle number concentration
Adding More Shape to Nanoscale Reference Materials, LiYF:Yb,Tm Bipyramids as Standards for Sizing Methods and Particle Number Concentration
Deumer J.; Andresen E.; Gollwitzer C.; Schürmann R.; Resch Genger U. Analytical Chemistry 96, 19004 to 19011.
Why this matters: This work supports the development of shape-defined nanoscale reference materials for more comparable sizing and particle concentration measurements.
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2024DatasetCross-WPLiYF4 nanoparticlesSAXSDataset
SAXS data of bipyramidal LiYF4 nanoparticles
Deumer J.; Andresen E.; Gollwitzer C.; Schürmann R.; Resch Genger U. Dataset repository.
Why this matters: This dataset provides supporting SAXS data linked to bipyramidal nanoparticle characterisation and reference material development.
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2024ArticleProject-linkedNanomedicinesStandardisation roadmapImpact
Toward an international standardisation roadmap for nanomedicine
Caputo F.; Favre G.; Borchard G.; Calzolai L.; Fisicaro P.; Frejafon E.; Günday Türel N.; Koltsov D.; Minelli C.; Nelson B. C.; Parot J.; Prina Mello A.; Zou S.; Ouf F. X. Drug Delivery and Translational Research 14, 2578 to 2588.
Why this matters: This paper provides international standardisation context directly aligned with METRINO’s priorities for harmonised methods and reference materials.
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2026ArticleProject-linkedSurface chemistryInterlaboratory comparisons
Making surface-functionalized nanoscale candidate reference and test materials for interlaboratory comparisons involving multi-method studies
Tavernaro I.; Abram S.-L.; Scholtz L.; et al. Analytical and Bioanalytical Chemistry, published 8 October 2026. DOI: 10.1007/s00216-026-06854-y. CC BY 4.0.
Why this matters: This METRINO-supported study develops and characterises aminated silica candidate test materials for interlaboratory comparisons, combining complementary measurements of particle properties and surface amino groups.
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2026ArticleProject-linkedGold nanoparticles3D imagingSBF-SEM
3D Reconstruction of Nanoparticle Distribution in Tumor Spheroids With Volume Electron Microscopy
Bottone D.; Gerken L. R. H.; Habermann S.; et al. Small, Early View, e75947, first published 27 October 2026. DOI: 10.1002/smll.75947. Open access.
Why this matters: This METRINO-supported study combines volume electron microscopy and segmentation to quantify gold nanoparticle distributions alongside cellular structures in tumour spheroids.
Read paperDOISupporting datasetAnalysis software
2025ArticleProject-linkedCitrate ligandsSurface characterisation
Quantifying Citrate Surface Ligands on Iron Oxide Nanoparticles with TGA, CHN Analysis, NMR, and RP-HPLC with UV Detection
Matiushkina A.; Abram S.-L.; Tavernaro I.; et al. Analytical Chemistry 97(36), 19627–19634. Published online 29 August 2025. DOI: 10.1021/acs.analchem.5c03024. CC BY 4.0.
Why this matters: This METRINO-supported study compares selective and nonselective methods for quantifying citrate ligands on iron oxide nanoparticles, showing how complementary measurements and suitable sample preparation help distinguish citrate from other organic surface residues.
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2025ArticleProject-linkedAminated silicaSurface groups
Quantifying surface groups on aminated silica nanoparticles of different size, surface chemistry, and porosity with solution NMR, XPS, optical assays, and potentiometric titration
Tavernaro I.; Rajotte I.; Thibeault M.-P.; et al. Nanoscale Advances 7(21), 6888–6900. First published 10 September 2025. DOI: 10.1039/D5NA00794A. Open access.
Why this matters: This METRINO-supported study compares measurements of amino functional groups on silica nanoparticles, using a bilateral laboratory study to identify method-dependent measurands, refine quantitative NMR workflows and assess the value of complementary surface-analysis methods.
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2026ArticleProject-linkedSilica shellsSAXSPhotoelectron spectroscopy
Combining Small-Angle X-ray Scattering with Photoelectron Spectroscopy to Increase the Accuracy of Silica Shell Thickness Measurements on Inorganic Nanocrystals
Abram S.-L.; Matiushkina A.; Cant D.; Engel N.; et al. The Journal of Physical Chemistry Letters 17(43), 12248–12255. Published online 2 September 2026. DOI: 10.1021/acs.jpclett.6c02495. CC BY 4.0.
Why this matters: This METRINO-supported study uses SAXS-derived electron densities to refine XPS and HAXPES estimates of silica-shell thickness on iron oxide and upconversion nanoparticles, improving agreement with complementary TEM and SAXS measurements.
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2026ReportCross-WPFinal reportProject outcomes
Final Public Report for 22HLT04 MetrINo: Metrology for innovative nanotherapeutics
Gollwitzer C.; Resch-Genger U.; Alasonati E.; Mortati L.; Nadal C.; Ceccaldi A.; Caputo F.; Schürmann R. Zenodo report, published 8 October 2026. DOI: 10.5281/zenodo.23244295. CC BY 4.0.
Why this matters: This final public report brings together METRINO’s reference-material candidates, measurement methods, good-practice guidance, tissue phantoms and interlaboratory-comparison evidence, alongside outcomes for research, industry and standardisation.
Open reportDOI
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